Fortunately, in California there are no established populations of Brown Recluse Spiders, though legends of their bite and venom abound. Still, it is helpful to know about this notorious spider that could easily be brought into California by commerce or travel.
Again, we emphasize that these spiders are not established in Alameda County, though through interstate shipment of goods and travel, it is possible that these spiders are brought into our state on a regular basis. Their establishment seems to have been prevented due to a variety of reasons, including environmental incompatibility and competition with other native spiders. Any suspected Brown Recluse spider should be submitted to us for identification.
- Monitor the corners, ceiling, and door jams for the web sac and vacuum immediately if found.
- Avoid leaving your porch light on at night, or use a motion detector sensor. A night-light will attract insects which attract spiders.
- Keep plants back from the perimeter of your living structure. Plants provide food for insects, which are food for spiders. When plants rest against the side of your home, it provides access for spiders to climb into your home.
- A clear open area will reduce the attractiveness to spiders. Remove debris and vegetation that provides shelter for spiders.
- Keep window and door screens in good repair.
- A monthly rinsing of eaves, windows, and doors will help reduce spider populations on the exterior of your home.
- An effective way to remove an unwanted spider from your home is to vacuum it up with the hose and wand attachment.
- Locating and removing eggs sacs will reduce future spider populations.
- The use of pesticides can aide in spider control. Use only chemicals registered for spiders. The standard treatment is around windows and doors, under eaves and along the foundation of the home.
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